JP2008225262A - Lens device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens device capable of optically adjusting a lens holding frame to a lens barrel body in a simple structure and simple working. <P>SOLUTION: The lens device swingably attaches the lens holding frame 35 of a front lens 12 through a swinging mechanism for optical adjustment to the lens barrel body 11. The swinging mechanism is composed of: a leaf spring member 41 for energizing the lens barrel body 11 and the lens holding frame 35 in a direction of being mutually separated by being interposed between the lens barrel body 11 and the lens holding frame 35; and a V-shaped groove 43 and a set screw 45 for swinging the lens holding frame 35 by being provided in three parts of a circumferential direction of the lens barrel body 11 and the lens holding frame 35, and advancing and retreating the lens holding frame 35 to the lens barrel body 11 in a direction of an optical axis against energizing force of an elastic means 37. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lens apparatus, and more particularly to a lens apparatus that performs optical adjustment by swinging a lens holding frame in a lens barrel body.

  An optical adjustment structure for optically illuminating a lens holding frame with respect to a lens barrel of a lens apparatus is disclosed in Patent Document 1.

Patent Document 1 discloses an optical adjustment structure in which a protrusion is formed at the rear part of a lens holding frame, and the protrusions are provided in a step shape so as to be continuous with the lens barrel in the circumferential direction. The distance between the lens holding frame and the lens barrel is adjusted so as to be in the best optical adjustment state. Thereafter, the lens holding frame is decentered in a direction perpendicular to the optical axis in a state where the projection is in contact with any one of the step surfaces, and the lens holding frame is positioned at a position where the best optical adjustment state is obtained. The lens barrel is coupled with an adhesive.
JP 2002-350702 A

  However, the optical adjustment structure of Patent Document 1 has a complicated structure in which a protrusion is formed on the lens holding frame and a step-shaped adjustment shape portion is formed on the lens barrel. Since there is a need to perform two adjustments, that is, the eccentric position adjustment, there is a problem that adjustment takes time.

  The present invention has been made in view of the above circumstances, and provides a lens apparatus that can easily adjust a lens holding frame with respect to a lens barrel body with a simple structure and simple operation. With the goal.

  In order to achieve the above object, the invention according to claim 1 is a lens device capable of adjusting the optical axis by attaching a lens holding frame to a lens barrel body through a swing mechanism so as to be swingable. The swing mechanism is interposed between the lens barrel body and the lens holding frame, and elastically biases the lens barrel body and the lens holding frame in a direction away from each other or a direction approaching each other, and the lens Provided at three positions in the circumferential direction of the lens barrel body and the lens holding frame, the lens holding frame is moved forward and backward with respect to the lens barrel body against the urging force of the elastic member to swing the lens holding frame. And an advancing / retreating means for moving.

  According to the first aspect of the present invention, the lens barrel body and the lens holding frame are biased in a direction away from each other or a direction approaching each other by interposing an elastic means between the lens barrel body and the lens holding frame. . Then, the lens holding unit is operated by appropriately operating the advancing / retreating means provided at three positions in the circumferential direction between the lens barrel main body and the lens holding frame to resist the urging force of the elastic member or using the urging force of the elastic member. Optical adjustment is performed by moving the frame forward and backward with respect to the lens barrel body. As a result, the lens holding frame can be optically adjusted with a simple structure with respect to the lens barrel body.

  According to a second aspect of the present invention, in the first aspect, the elastic means of the swing mechanism is configured by a ring-shaped leaf spring member, and the advance / retreat means of the swing mechanism includes the lens barrel body and the A V-shaped groove formed on one of the lens holding frames, and attached to the other of the lens barrel body and the lens holding frame, and the leaf spring member is attached to one inclined surface of the V-shaped groove. The lens holding frame is advanced and retracted with respect to the lens barrel body by adjusting a screwing amount of the set screw.

  According to the second aspect of the present invention, when the set screw is screwed in, the set screw pushes the inclined surface of the V-shaped groove, so that the lens holding frame is moved by the force acting in the direction of the photographing optical axis. The When the set screw is loosened, the lens holding frame is moved in the reverse direction. Therefore, by appropriately adjusting the screwing amounts of the three set screws, the posture of the lens holding frame with respect to the lens barrel body can be changed, so that optical adjustment can be easily performed.

  According to a third aspect of the present invention, in the first or second aspect, the lens device is a four-group lens device including a first lens group, a second lens group, a third lens group, and a fourth lens group. The first lens group is a front lens held by the lens holding frame, the second lens group is a variator lens moved in the photographing optical axis direction, and the third lens group is anti-vibration. The fourth lens group is a focus lens.

  The invention described in claim 3 shows a suitable lens apparatus in the case where the invention described in claim 1 is applied to a lens apparatus having a four-group lens configuration. The lens device includes a first lens group that is a front lens held by the lens holding frame according to claim 1 and a second lens group that is a variator lens that changes a focal length from the front to the rear in the optical axis direction. A third lens group that is an anti-vibration lens and a fourth lens group that is a focus lens are arranged. In the lens device having such a four-group lens configuration, optical adjustment of the front lens is performed as a final adjustment operation after the lens device is assembled. Therefore, according to the lens device having the four-group lens structure according to claim 3 provided with the optical adjustment structure according to claim 1, optical adjustment for final adjustment is facilitated.

  According to the lens device of the present invention, the elastic means is interposed between the lens barrel main body and the lens holding frame, and the lens barrel main body and the lens holding frame are urged away from each other or in a direction approaching each other. In addition, since the optical adjustment is performed by appropriately operating the advancing and retreating means provided at three positions in the circumferential direction between the lens barrel main body and the lens holding frame, the lens holding frame has a simple structure with respect to the lens barrel main body. Optical adjustment can be performed.

  A preferred embodiment of a lens apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

  FIG. 1 is a side sectional view of a lens apparatus 10 according to the embodiment. The lens device 10 includes a first lens group 12, a second lens group 14, a third lens group 16, and a fourth lens group from the front side of the photographing optical axis (subject side) to the rear side of the photographing optical axis (imaging side). The object light that has passed through the first to fourth lens groups 12 to 18 is composed of R, G, B of the color separation prism 20 via the color separation prism 20 constituting the color separation optical system. The image is formed on the image pickup devices 22, 24, and 26 provided at the respective emission ends. A camera body (not shown) equipped with the lens device 10 is subjected to predetermined processing (white balance, γ correction, etc.) on the imaging signals obtained from the imaging elements 22, 24, and 26 in a predetermined format. A signal processing circuit (not shown) for generating a video signal is mounted.

  The first lens group 12 is a so-called front lens, the second lens group 14 is a variator lens that changes the focal length, and the third lens group 16 is an anti-vibration lens that is driven in a direction that cancels vibration caused by camera shake or the like. The fourth lens group 18 is a focus lens that adjusts the focal point.

  These first to fourth lens groups 12 to 18 are held in the lens barrel body 11. In addition, a pair of guide bars 28 and 30 (see FIGS. 1 and 7) parallel to the optical axis are inserted into the lens barrel body 11, and the second lens group 14 is inserted into the guide bars 28 and 30. The holding frame 32 and the holding frame 34 of the fourth lens group 18 are slidably supported, and the housing 36 of the third lens group 16 is fixed to the guide bars 28 and 30. The housing 36 may be directly fixed to the lens barrel body 11.

  The second lens group 14 is provided with a nut (not shown) that constitutes a screw feed device, and a feed screw (not shown) that also constitutes a screw feed device is screwed and connected to the nut. The feed screw is disposed in parallel with the optical axis, and its end is connected to the output shaft of a zoom stepping motor (not shown). When a zoom signal is output from the camera body side to a zoom driver circuit (not shown) of the zoom stepping motor, the zoom stepping motor rotationally drives the feed screw in a direction corresponding to the signal. As a result, the second lens group 14 is moved back and forth in the optical axis direction along the guide bars 28 and 30 and adjusted to a desired focal length.

  Similarly, the fourth lens group 18 is also provided with a nut (not shown) constituting a screw feed device, and a feed screw (not shown) constituting the screw feed device is screwed and connected to the nut. The feed screw is disposed in parallel with the optical axis, and its end is connected to the output shaft of a focusing stepping motor (not shown). When a focus signal is output from the camera body side to a focus driver circuit (not shown) of the focus stepping motor, the focus stepping motor rotationally drives the feed screw in a direction corresponding to the signal. As a result, the fourth lens group 18 is moved back and forth in the optical axis direction along the guide bars 28 and 30 to be focused.

  Next, the structure of the vibration isolation mechanism will be described.

  2 is a perspective view of the housing 36 equipped with the vibration-proof lens 16 as viewed from the rear, and FIG. 3 is a perspective view of the housing 36 shown in FIG.

  As shown in these drawings, a third lens group (here, referred to as an anti-vibration lens for convenience) 16 is held by a lens holding frame 50, and this lens holding frame 50 is within a plane orthogonal to the photographing optical axis L. It is supported so as to be movable in two different directions. Hereinafter, the moving direction of the anti-vibration lens 16 is defined as an X direction (lateral direction in FIGS. 2 and 3) and a Y direction (vertical direction in FIGS. 2 and 3). Further, a mechanism for moving the image stabilizing lens 16 in the X direction is referred to as an X movement mechanism, and a mechanism for moving in the Y direction is referred to as a Y movement mechanism.

  First, the X movement mechanism will be described.

  A movement guide bar 52 is fixed to the lens holding frame 50. The movement guide bar 52 is disposed in the Y direction, and the slider 54 is engaged with the movement guide bar 52. The slider 54 is formed in an L shape composed of an upper side portion and a left side portion, and two guide portions 56, 56 are formed on the left side portion so as to protrude in the optical axis direction. Guide holes (not shown) are formed in each guide portion 56 in the Y direction, and the moving guide bar 52 is inserted through these guide holes. Thereby, the slider 54 is engaged along the movement guide bar 52 so as to be slidable in the Y direction. Therefore, the lens holding frame 50 is supported by the slider 54 so as to be slidable in the Y direction. Further, the movement of the lens holding frame 50 in the X direction is restricted by the slider 54, and when the slider 54 is moved in the X direction, the lens holding frame 50 is also moved in the X direction.

  Note that the lower end portion 52A of the movement guide bar 52 in the drawing is engaged with the X-direction long hole 58 formed in the housing 36, whereby the lens holding frame 50 falls (inclination with respect to the optical axis direction). Is prevented.

  A guide hole (not shown) in the X direction is formed on the upper side of the slider 54, and the fixed guide bar 60 is inserted into the guide hole. The fixed guide bar 60 is disposed in the X direction, and both ends thereof are fixed to the housing 36. Accordingly, the slider 54 is supported so as to be slidable in the X direction along the fixed guide bar 60. By sliding the slider 54 in the X direction, the lens holding frame 50 engaged with the left side portion of the slider 54 via the moving guide bar 52 is slid in the X direction.

  A planar motor coil (trade name “Fine Pattern Coil” (registered trademark)) 62 is fixed to the upper side of the slider 54, and a flexible printed circuit board (hereinafter referred to as “flexible”) is provided on the lower surface of the motor coil 62. 64 output ends are bonded and fixed. The motor coil 62 is disposed in the X direction around the outer side of the vibration-proof lens 16, and a position sensor 66 such as a Hall element is positioned and fixed to the flex 64.

  The flex 64 is drawn out from the motor coil 62 in the X direction, and is drawn out of the case 36 through the side opening 68 of the case 36. The flex 64 drawn to the outside is bent outward, and after a V-shaped (or U-shaped) bent portion is formed, the lens barrel main body from a predetermined position of the lens barrel main body 11 (see FIG. 1). 11 to the outside. The extracted flexible cable 64 is connected to a unit that supplies power and controls the vibration-proof lens 16. The side opening 68 of the housing 36 communicates with the end surface of the housing 36 through a slit 70, and the flexible 64 is disposed inside the side opening 68 by passing the flexible 64 through the slit 70.

  A magnet 72 is disposed outside the motor coil 62 so as to face the motor coil 62. The magnet 72 is formed in a rectangular plate shape, and is arranged so that the S pole 72A and the N pole 72B are arranged in the X direction. The position sensor 66 described above is disposed opposite to the boundary between the S pole 72A and the N pole 72B of the magnet 72, detects a change in the magnetic field, and outputs the detected signal to the unit via the flex 64. .

  A metal plate (not shown) serving as a yoke is provided outside the magnet 72. The metal plate is attracted to the magnet 72 by the magnetic force of the magnet 72. Further, the metal plate is formed in a rectangular shape larger than the magnet 72, and is attached in a state where the edge portion protrudes from the magnet 72. A recess having a size of a metal plate is formed on the outer surface of the housing 36, and an opening 74 having a size of a magnet 72 is formed on the inside thereof. The metal plate is stored in the recess of the housing 36, A magnet 72 is accommodated in the opening 74.

  Inside the motor coil 62, a metal plate 76 serving as a yoke is disposed in the X direction so as to face the motor coil 62. One end of the metal plate 76 is inserted into the slit 70, and the other end is inserted into a groove 78 formed in the housing 36, so that the metal plate 76 is fixed to the housing 36.

  In the X moving mechanism configured as described above, since the motor coil 62 is disposed in the magnetic field formed by the magnet 72 and the two metal plates (one not shown) 76, the motor coil 62 is energized. Thus, the motor coil 62 and the slider 54 that supports the motor coil 62 receive a force in the X direction. Accordingly, the slider 54 and the lens holding frame 50 are moved in the X direction, and accordingly, the image stabilizing lens 16 is moved in the X direction. The above is the structure of the vibration isolation mechanism.

  Next, the Y moving mechanism will be described.

  A movement guide bar 82 is fixed to the lens holding frame 50. The movement guide bar 82 is disposed in the X direction, and a slider 84 is engaged with the movement guide bar 82. The slider 84 is formed in an L shape composed of a lower side portion and a right side portion, and two guide portions 86, 86 are formed on the lower side portion so as to protrude in the optical axis direction. Guide holes (not shown) are formed in each guide portion 86 in the X direction, and the moving guide bar 82 is inserted through these guide holes. Thereby, the slider 84 is engaged along the movement guide bar 82 so as to be slidable in the X direction. Accordingly, the lens holding frame 50 is supported by the slider 84 so as to be slidable in the X direction. The movement of the lens holding frame 50 in the Y direction is restricted by the slider 84, and when the slider 84 is moved in the Y direction, the lens holding frame 50 is also moved in the Y direction.

  A Y-direction guide hole (not shown) is formed in the right side portion of the slider 84, and the fixed guide bar 90 is inserted into the guide hole. The fixed guide bar 90 is disposed in the Y direction, and both ends thereof are fixed to the housing 36. Accordingly, the slider 84 is supported so as to be slidable in the Y direction along the fixed guide bar 90. By sliding the slider 84 in the Y direction, the lens holding frame 50 engaged with the lower side portion of the slider 84 via the moving guide bar 82 is slid in the Y direction.

  A flat motor coil (trade name “Fine Pattern Coil” (registered trademark)) 92 is fixed to the right side of the slider 84, and a flexible printed circuit board (hereinafter referred to as “flexible”) is provided on the left surface of the motor coil 92. The output end of 94 is bonded and fixed. The motor coil 92 is disposed in the Y direction around the outer side of the anti-vibration lens 16, and a position sensor 96 such as a Hall element is positioned and fixed to the flex 94.

  The flex 94 is drawn out from the motor coil 92 in the Y direction, and is drawn out of the housing 36 through the side opening 98 of the housing 36. The flex 94 pulled out to the outside is bent outward, and after a V-shaped (or U-shaped) bent portion is formed, the lens barrel main body from a predetermined position of the lens barrel main body 11 (see FIG. 1). 11 to the outside. The extracted flexible cable 94 is connected to a unit that performs power supply and operation control of the image stabilizing lens 16. The side opening 98 of the housing 36 is communicated with the end surface of the housing 36 through the slit 100, and the flex 94 is disposed inside the side opening 98 by passing the flexible wire 94 through the slit 100.

  A magnet 102 is disposed outside the motor coil 92 so as to face the motor coil 92. The magnet 102 is formed in a rectangular plate shape, and is disposed so that the S pole 102A and the N pole 102B are arranged in the Y direction. The position sensor 96 described above is disposed opposite to the boundary between the S pole 102A and the N pole 102B of the magnet 102, detects a change in the magnetic field, and outputs the detected signal to the unit via the flex 94. .

  A metal plate (not shown) serving as a yoke is provided outside the magnet 102. The metal plate is attracted to the magnet 102 by the magnetic force of the magnet 102. Further, the metal plate is formed in a rectangular shape larger than the magnet 102, and is attached in a state where the edge portion protrudes from the magnet 102. A recess having a size of a metal plate is formed on the outer surface of the housing 36, and an opening 104 having a size of the magnet 102 is formed on the inside thereof. The metal plate is stored in the recess of the housing 36, The magnet 102 is accommodated in the opening 104.

  Inside the motor coil 92, a metal plate 106 serving as a yoke is disposed in the Y direction so as to face the motor coil 92. One end of the metal plate 106 is inserted into the slit 100, and the other end is inserted into a groove 108 formed in the housing 36, so that the metal plate 106 is fixed to the housing 36.

  In the Y moving mechanism configured as described above, since the motor coil 92 is disposed in the magnetic field formed by the magnet 102 and the two metal plates (one is not shown) 106, the motor coil 92 is energized. Thus, the motor coil 92 and the slider 84 that supports the motor coil 92 receive a force in the Y direction. Accordingly, the slider 84 and the lens holding frame 50 are moved in the Y direction, and accordingly, the image stabilizing lens 16 is moved in the Y direction. The above is the structure of the vibration isolation mechanism.

  FIG. 4 shows a cross section in which a lens holding frame 35 of a first lens group (referred to herein as a front lens for convenience) 12 is swingably attached to a lens barrel body 11 via a swing mechanism for optical adjustment. The figure is shown.

  The swing mechanism shown in the figure includes an elastic means 37 that is interposed between the lens barrel body 11 and the lens holding frame 35 and biases the lens barrel body 11 and the lens holding frame 35 away from each other. The lens barrel main body 11 and the lens holding frame 35 are provided at three positions in the circumferential direction, and the lens holding frame 35 is advanced and retracted in the optical axis direction with respect to the lens barrel main body 11 against the urging force of the elastic means 37. And advancing / retreating means 39 for swinging the lens holding frame 35. The advance / retreat means 39 are arranged at equal intervals in the circumferential direction.

  Although FIG. 5 is a half sectional view, the elastic means 37 includes a ring-shaped leaf spring member 41. Further, the advancing / retreating means 39 shown in FIG. 4 includes V-shaped grooves 43 formed at three locations (two locations not shown) on the outer periphery of the lens holding frame 35 as shown in FIG. 11 and a set screw 45 that is screwed into the screw hole 11A formed in the groove 11 and pressed against the inclined surface 43A of the V-shaped groove 43 by the urging force of the leaf spring member 41.

  As shown in FIG. 6, the leaf spring member 41 of FIG. 6 is formed along a substantially ring-shaped inner flange portion 49 in which an opening 47 for taking in subject light into the lens barrel body 11 is formed as shown in FIG. Be placed. Since the stainless steel guide bars 28 and 30 are disposed on the left and right sides in the lens barrel body 11, the opening 47 is formed in a vertically long slot. That is, if the opening 47 is formed into a perfect circle, harmful light incident from the side of the opening is reflected on the guide bars 28 and 30 to cause a ghost phenomenon. Therefore, in order to cut off harmful light reaching the guide bars 28 and 30, the opening 47 is formed in a vertically long slot as shown in FIG.

  Further, in order to prevent a ghost phenomenon due to harmful light reflected by the inner peripheral surface of the opening 47, a ring-shaped mask 51 shown in FIG. The opening 53 of the mask 51 has a vertically long shape corresponding to the opening 47 and is slightly smaller than the opening 47 of the inner peripheral flange 49. Thereby, since the light reaching the inner peripheral surface of the opening 47 is cut by the mask 51, a ghost phenomenon can be prevented.

  The mask 51 is integrally formed with rectangular protrusions 51A and 51A and triangular protrusions 51B and 51B for positioning the mask 51 on the inner flange portion 49 at predetermined positions. In addition, rectangular recesses 49A and 49A and triangular recesses 49B and 49B are formed in the inner flange portion 49 corresponding to the protrusions 51A and 51B. The triangular protrusions 51B and 51B and the triangular recesses 49B and 49B are disposed at the left and right target positions, and the rectangular protrusions 51A and 51A and the rectangular recesses 49A and 49A are disposed at the target positions with respect to the photographing optical axis L. . Therefore, the triangular protrusions 51B and 51B are fitted into the triangular recesses 49B and 49B, and the rectangular protrusions 51A and 51A are fitted into the rectangular recesses 49A and 49A, so that the mask 51 is connected to the inner funnel part 49. The top, bottom, left and right and front and back are also regulated and positioned. An adhesive sheet is formed integrally or separately on the surface (subject side surface) of the mask 51, and dust adhering from the outside and scraps of the lens holding frame 35 scraped by the set screw 45 described later are adhered to the mask 51 by the adhesive sheet. It is supposed to be. Therefore, in positioning the mask 51, the rectangular protrusions 51A and 51A that define the front and back of the mask 51 and the rectangular recesses 49A and 49A are required.

  The set screws 45 and the V-shaped grooves 43 shown in FIG. 6 are arranged at three equal intervals on the circumference. In FIG. 6, the lower inclined surface 45 </ b> A of the set screw 45 is pressed against the inclined surface 43 </ b> A of the V-shaped groove 43 by the urging force of the leaf spring member 41.

  When the set screw 45 is screwed in this state, the inclined surface 45A of the set screw 45 pushes the inclined surface 43A of the V-shaped groove 43, so that the force acting in the direction of the photographic optical axis out of the pushing force (rightward in FIG. 6) The lens holding frame 35 is moved rightward in FIG. When the set screw 45 is loosened, the lens holding frame 35 is moved leftward in FIG. 6 by the urging force of the leaf spring member 41. Therefore, the lens holding frame 35 can be swung with respect to the lens barrel main body 11 and the posture of the lens holding frame 35 can be changed by appropriately adjusting the screwing amounts of the three set screws 45. Adjustment can be performed easily.

  The optical adjustment is an optical adjustment performed while confirming a point image with a collimator. The lens holding frame 35 is appropriately changed in posture with respect to the lens barrel body 11, and the lens is positioned at the best position where the point image can be clearly seen. The holding frame 35 is fixed to the lens barrel body 11 with an adhesive or the like.

  In the embodiment, the lens barrel body 11 and the lens holding frame 35 are urged away from each other by the leaf spring member 41. However, the present invention is not limited to this, and elastic means in which the urging force works in the opposite direction. Thus, the same effect can be obtained even if the lens barrel body 11 and the lens holding frame 35 are urged toward each other. Further, the V-shaped groove 43 is formed on the lens holding frame 35 side, and the set screw 45 is attached on the lens barrel main body 11 side, but the lens holding frame 35 is fitted to the outer periphery of the lens barrel main body 11. For example, a set screw 45 may be attached to the lens holding frame 35 side, and a V-shaped groove 43 may be formed on the lens barrel body 11 side.

  On the other hand, in the lens device 10 having the four-group lens configuration according to the embodiment, the optical adjustment of the front lens 12 is performed as a final adjustment operation after the lens device 10 is assembled. Therefore, according to the lens device 10 having the four-group lens structure provided with the optical adjustment structure of the embodiment, the final adjustment optical adjustment becomes easy.

Sectional drawing which showed the structure of the lens apparatus of embodiment The perspective view which looked at the housing | casing equipped with the anti-vibration lens of the lens apparatus shown in FIG. 1 from the back of the imaging | photography optical axis. The perspective view which removed the actuator from the housing | casing shown in FIG. Sectional view showing the lens holding frame of the front lens, the lens barrel body, and the joint Half sectional view showing a leaf spring member mounted on the lens barrel body side The principal part expanded sectional view which showed the engagement state of a set screw and a V-shaped groove | channel The perspective view which showed the inner bringe part of the lens barrel main body Front view with the mask attached to the inner flange of the lens barrel body

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Lens apparatus, 11 ... Lens barrel main body, 12 ... 1st lens group, 14 ... 2nd lens group, 16 ... 3rd lens group, 18 ... 4th lens group, 20 ... Color separation prism, 22, 24, DESCRIPTION OF SYMBOLS 26 ... Image sensor, 28, 30 ... Guide bar, 32, 34, 50 ... Lens holding frame, 35 ... Lens holding frame, 37 ... Elastic means, 39 ... Advance / retreat means, 41 ... Leaf spring member, 43 ... V-shaped groove 45, set screw, 51 ... mask, 62, 92 ... planar motor coil, 72, 102 ... magnet

Claims (3)

In the lens apparatus capable of adjusting the optical axis by attaching a lens holding frame to the lens barrel body through a swing mechanism so as to be swingable.
The swing mechanism is
Elastic means interposed between the lens barrel body and the lens holding frame to bias the lens barrel body and the lens holding frame in a direction away from each other or a direction approaching each other;
The lens holding frame is provided at three locations in the circumferential direction of the lens barrel body and the lens holding frame, and moves the lens holding frame forward and backward against the urging force of the elastic member. Advancing and retracting means for swinging,
A lens device comprising: The elastic means of the swing mechanism is composed of a ring-shaped leaf spring member,
The advancing / retreating means of the swing mechanism is attached to the other of the lens barrel body and the lens holding frame, and a V-shaped groove formed in one of the lens barrel body and the lens holding frame. The set holding screw is pressed against and abutted against one inclined surface of the V-shaped groove by the urging force of the leaf spring member, and the lens holding frame is adjusted by adjusting the screwing amount of the set screw. The lens apparatus according to claim 1, wherein the lens apparatus is advanced and retracted with respect to the lens barrel body. The lens device is a four-group lens device including a first lens group, a second lens group, a third lens group, and a fourth lens group,
The first lens group is a front lens held by the lens holding frame, the second lens group is a variator lens moved in the photographing optical axis direction, and the third lens group is an anti-vibration lens. The lens device according to claim 1, wherein the fourth lens group is a focus lens.

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